Donald W Dotson

US Patent:

20120321833, Dec 20, 2012

Filed:

Aug 2, 2012

Appl. No.:

13/564896

Inventors:

Alan Ekquist - Clinton MI, US
Michael R. Harvey - Milford MI, US
Donald Dotson - Toledo OH, US

International Classification:

B28B 17/00

US Classification:

428 641, 425157

Abstract:

A programmable pellet press for compressing a powdered sample and forming a sample disc, including a hydraulic mechanism for compressing the sample in a mold operatively and electrically connected to a control mechanism for commanding an exertion of low constant preloading pressure followed by pressure increases with constant pressure dwell times upon the hydraulic mechanism. An algorithm for a programmable pellet press on computer readable media including performing a pressurization subroutine, performing a proportional-integral-derivative (PID) feedback loop, performing a depressurization subroutine, and performing an unloading subroutine when pressure is at a baseline level. A method of compressing a powdered sample into a sample disc by loading the powdered sample into a mold of a programmable pellet press, from a baseline pressure, increasing hydraulic pressure and maintaining a preloading pressure against the sample, performing pressure increases upon the sample, depressurizing the sample, and forming a sample disc. A sample disc formed.